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August 27, 2014

Homework Help: chemistry

Posted by ChemMaster98 on Monday, March 31, 2008 at 7:14am.

Much of the brown haze hanging over large cities is nitrogen dioxide, NO2(g). Nitrogen dioxide reacts to form dinitrogen tetroxide, N2O4(g), according to the equilibrium.

2NO2(g) N2O4(g) + 57.2 kJ

(brown) (coulorless)

Use this equilibrium to explain why the brownish haze over a large city dissapears in the winter , only to reappear again in the spring.(Assume that the atmosphere over a city constitutes a closed system.)

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